The thing is that PBX phones will never be able to dial directly to IP phones, because the PBX does not outpulse digits on extensions ports. So users will have to dial the number for the gateway first, wait for dialtone, then dial again the IP phone extensions.
All this assuming you can make the third-party gateway to work with CCM.
From one extension of your pbx, try calling another extension and possibly add digits after the number.
You will find that these additional digits are not relayed unless the remote extension answer the calls.
This is why interfaces using FXS/FXO are always incomplete and give a bad service to users. At the very minimum, you shoud use both FXS and FXO on BOTH router and PBX, but then it becomes even more complicated and costly.
Integration professionally made are with T1/E1 interfaces, ISDN BRI, ot at very minumum E&M analog trunks
Once you find which interface you can put on the PBX, we can point you to documents with configuration examples.
But you won't find documents for integration using simply an FXO gateway, because it is not the right way to do it.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...